NONAQUEOUS ELECTROLYTE SECONDARY BATTERY POSITIVE ELECTRODE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery positive electrode in which separation of a positive electrode mixture layer is lessened, and which has improved charge/discharge cycle characteristics. A nonaqueous electrolyte secondary battery positive...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: SAKITANI, Nobuhiro
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery positive electrode in which separation of a positive electrode mixture layer is lessened, and which has improved charge/discharge cycle characteristics. A nonaqueous electrolyte secondary battery positive electrode according to an aspect of the present disclosure is provided with a positive electrode collector and a positive electrode mixture layer that is formed on the surface of the positive electrode collector. The positive electrode mixture layer contains a positive electrode active material, fibrous carbon, and nonfibrous carbon. When the positive electrode mixture layer is divided into two equal regions in the thickness direction, and the half of the regions that is on the positive electrode collector side is defined as a first region and the half of the regions that is on the outer surface side is defined as a second region, the mass proportion of the fibrous carbon with respect to the total mass of the fibrous carbon and the nonfibrous carbon in the first region is set to be less than the mass proportion of the fibrous carbon with respect to the total mass of the fibrous carbon and the nonfibrous carbon in the second region.